Flush valve device



Nov. 10, 1931. A. w. MOSELEY 1,830,955

' FLUSH VALVE DEVICE Filed May 21, 25

Patented Nov. 10, 1931 UNITED STATES PATENT OFFIICE ALEXANDER W.MOSELEY, OF EVANSTON,.ILLINOIS, ASSIGNOR T SLOAN VALVE COM- PANY, OFCHICAGO, ILLINOIS; AMQORPORATION OF ILLINOIS FLUSH VALVE DEVICE.

Application filed May21, 1925, Serial No. 31,796, and inSwefienseptember- 10, 1925.

This invention relates to flush valve devices and has for its object toprovide a new and improved device of this descript on.

The invention has as a further ob ect to prevent noise due to thegurgling action of the water being discharged through the dischargepipe.

The invention has as a further object to provide means for preventingcontaminat on by a back flow through the discharge plpe leading from theflush valve.

The invention has as a further object to provide a quick, complete andeflicient discharge of the water through the discharge pipe..

The invention has other objects which are more particularly pointed outin the accompanying description.

Referring now to the drawings:

Fig. 1 is a view showing one form of device embodying the invention.

Fig. 2 is a longitudinal sectional view through the stream contractingdevice.

Fig. 3 is a sectional view taken on line 33 of Fig. 2.

Like numerals refer to like parts throughout the several figures.

Referring now to the drawings, I have shown a flush valve 1 connected bymeans of a discharge pipe 2 with a bowl 3. The flush valve is connectedby the pipe 4 with any suitable source of water supply. When the handle5 of the flush valve is operated the valve is opened and the waterpasses through the pi e 4 through the valve and down throug thedischarge pipe 2 into the bowl. Associated with the flush valve andpreferably arranged in the discharge pipe 2 is a device arranged so asto decrease the cross sectional area of the stream of water flowing fromthe flush valve and to provide means for admitting air at some pointwhere the area of the stream is contracted. In the particularconstruction shown the controlling device is located in the dischargepipe 2 and consists of an enlarged upper portion 6 and an enlarged lowerportion 7 and a contracted intermediate portion 8. The device isprovided with some means for supporting it, and in the constructionshown the enlarged portion 6 is provided with the flange 9 which isclamped between the flange 10 on the discharge pipe 2 and the lower end11 of the flush valve casing, the parts being held in position by theunion nut 12. Means is provided for admitting air at some point alongthe intermediate contracted portion 8 of the device. In the constructionshown there is provided one or more openings 13. These openingspreferably extend downwardly. The enlarged portion 7 is preferablyprovided with a groove 14 for a suitable packing to insure a snug fitwith the discharge pipe 2. When the pipe 2 projects above the opening 13it is provided with one or more openings 15 located somewhere betweenthe ends of the portions 7 and 9 so that outside air may be admittedthrough such opening or openings and into the opening-or openings 13. Inthe operation of the device the water flows from the flush valve intothe enlarged upper end 9 and then through the contracted intermediateportion 8 and out of the enlarged portion 7 The velocity of the waterthrough the central portion due to the contraction is higher than thevelocity of the water in the enlarged upper and lower portions and inthe discharge pipe. after it leaves the enlarged lower portion. Thewater flowing through the contracted portion therefore tends to draw airin through the openings 13 and no water escapes through these openings.After the water is shut off by the flush valve and ceases'to flowthrough the contracted portion 8, air passes through the openings 13into the discharge pipe 2, thereby preventing the water from beingpartially or wholly trapped in the pipe 2. This also prevents gurglingof the water in the. pipe 2 as often happens with the constructionheretofore in use. This insures the speedy draining of the water fromthe discharge pipe 2 into the bowl. This also prevents contaminationproduced by water being sucked back from the bowl through the flushvalve into the supply pipe by siphonage due to the discharge piperemainingf full of water. The device is so constructed and the parts soproportioned that when the water flows therethrough this water will not100 flow out through the openings 13. Any desired proportion of theparts may be used. I have found; for example, that with a discharge pipehaving an internal diameter of 1 inches I am ableto get proper resultsby having the contracted portion 8 made with a diameter 0 of an inch.Other proportions may be used and I have simply specified thisparticular proportion as being one I have used with discharge pipeshaving the dimensions given. It will be noted that the device hascertain important functions. It prevents water from escaping through theair inlet holes, and it permits air to enter the inlet holes after thewater has been discharged through the contracted portion. Any. suitableflush valve may be used and I have therefore not shown the constructionof this flush valve as the device operates with any of the usual flushvalves now in use wherein water is intermittently discharged through adischarge pipe. When the stream contracting device is placed in theupper end of the discharge pipe 2 so that said discharge pipe surroundsit and an opening 15 is provided in the discharge pipe this opening ispreferably located so as to be above the opening 13 in the streamcontracting device so that if any water should get in between the streamcontracting device and the outer pipe it will not escape but will passthrough the opening 13, in the-intervals between the discharges from theflush valve.

I claim:

- 1. A device of the kind described comprising a flush pipe, a fixedstream contractin device in said flush pipe having an enlarge upper endand an enlarged lower end and a contracted intermediate portion, and an.

air admission opening in said contracted intermediate portion, said airadmission ope'n: ing extending downwardly from the exterior toward theinterior of the contracted portion, said air admission opening being incommunication with the outside atmosphere so that air may enter thereinto prevent back siphoning.

2. A device of the kind described comprising a fixed stream contractingdevice having an enlarged upper end and an enlarged lower end and acontracted intermediate portion, an air admission'opening in saidcontracted intermediate portion, and a discharge pipe 4. A device of thekind described compris ing an outer pipe, and a device in said outerpipe and enclosed thereby for preventing the back siphonage of waterthrough said pipe after the forward flow therethrough has ceased, saiddevice having an opening therein intermediate its ends, said outer pipealso having an opening therein.

5. A device of the kind described comprising an outer pipe, a device insaid outer pipe separate therefrom for preventing the back siphonage ofwater through said pipe after the forward flow therethrough has ceased,said device having a water-tight connection at both ends thereof withsaid outer pipe and means in said outer pipe for admitting air whichenters saiddevice so as to prevent back siphoning.

6. A device of the kind described comprising an outer pipe, a streamcontracting device in said outer pipe and separate therefrom and havinga contracted intermediate portion,said stream contracting device havinga water-tight connection at both its ends, with said outer pipe andmeans in said outer pipe for admitting air which enters said steamcontracting device so as to prevent back siphoning.

7. A device of the kind described comprising an outer pipe, a device insaid outer pipe for preventing the back siphonage of water through saidpipe after the forward flow therethrough has ceased, there being a spacebetween said device and said outer pipe, a communication between theinterior of said device and said space and a communication between saidspace and the outer atmosphere, said latter communication being onahigher level than the first mentioned communication.

Signed at Chicago, county of Cook and State of Illinois, this 13th dayof May, 1925.

ALEXANDER \V. MOSELEY.

into which the .water from said stream contr'acting device isdischarged.

3. A device of the kindidescribed comprising an outer pipe, a streamcontracting de vice in said outer pipe and enclosed thereby having acontracted intermediate portion, an air admlssion opening in said.

contracted intermediate portion, and an air admission opening in theouter pipe, the .air

admission openingin the outer pipe being located above the opening inthe stream contracting device.

